Abstract

The blue corner of the writer’s color mixture diagram is dichromatic in the sense that all colors in this region can be matched by mixtures of 465 mµ and a monochromatic stimulus at the red end of the spectrum. In order to locate spectrally pure stimuli below 486.8 mµ on the mixture diagram it has been necessary to use 486.8 mµ, 520 mµ, and 674 mµ as primaries. One can also use the fact that the confusion lines are straight and converge at the alychne to increase the precision in plotting. The writer’s own mixture data have been used to illustrate these principles.

© 1959 Optical Society of America

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References

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  1. G. A. Fry, Effect of Chromatic Adaptation upon Normal Color Vision, Final Report, Phase 4, The Ohio State University Research Foundation to the Office of Naval Research, Contract No. Nonr-1066(00), Project No. NR 140–061 (March22, 1954).
  2. R. J. Ball and G. A. Fry, Am. J. Optom. 36, 200 (1959).
    [CrossRef]

1959 (1)

R. J. Ball and G. A. Fry, Am. J. Optom. 36, 200 (1959).
[CrossRef]

Ball, R. J.

R. J. Ball and G. A. Fry, Am. J. Optom. 36, 200 (1959).
[CrossRef]

Fry, G. A.

R. J. Ball and G. A. Fry, Am. J. Optom. 36, 200 (1959).
[CrossRef]

G. A. Fry, Effect of Chromatic Adaptation upon Normal Color Vision, Final Report, Phase 4, The Ohio State University Research Foundation to the Office of Naval Research, Contract No. Nonr-1066(00), Project No. NR 140–061 (March22, 1954).

Am. J. Optom. (1)

R. J. Ball and G. A. Fry, Am. J. Optom. 36, 200 (1959).
[CrossRef]

Other (1)

G. A. Fry, Effect of Chromatic Adaptation upon Normal Color Vision, Final Report, Phase 4, The Ohio State University Research Foundation to the Office of Naval Research, Contract No. Nonr-1066(00), Project No. NR 140–061 (March22, 1954).

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Figures (4)

F. 1
F. 1

Color match involving two points on a confusion line.

F. 2
F. 2

Use of confusion lines in locating the blue end of the spectrum locus.

F. 3
F. 3

Color mixture data for GAF.

F. 4
F. 4

Mixtures of 468 mµ, and 674 mµ which match the monochromatic stimuli at the blue end of the spectrum. The sum of E674 and E468 is kept constant at 221 trolands.

Tables (3)

Tables Icon

Table I Color mixture data for GAF. Primaries: 468 mµ, 520 mµ, and 674 mµ. Luminosity coefficients: L468=L520=L674.

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Table II Mixture data (420 mµ to 486.8 mµ). Primaries: 674 mµ, 520 mµ, and 486.8 mµ. Luminosity coefficients are all equal.

Tables Icon

Table III Confusion line data.

Equations (10)

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g λ = E 520 / E λ ,
ϕ = ( r N r λ ) / ( g N g λ ) .
r = E 674 / E λ
g = E 520 / E λ .
r = E 674 / E λ
g = 221 E 520 / E λ .
r N = [ ( E 674 ) / 221 ] + r 468 [ 1 ( E 674 / 221 ) ] .
g N = g 468 [ 1 ( E 674 / 221 ) ] .
r = 1.1061 r + 0.1061 g 0.1061 ,
g = 0.9403 r + 0.0597 g + 0.9403 .